When there is DLT, different firms excel in different layers of the vertical chain of complementaryproducts.
当有dlt的时候，不同的公司擅长补充产品的垂直链的不同层。
2
Here's what's known about the effectiveness of some of the more common complementaryproducts and remedies used to soothe the symptoms of premenstrual syndrome.
这里是一些疗效显著的用来缓和经前综合症症状的常见辅助品和疗法。
3
Producers of intellectual property can actually benefit from free riding if IP "thieves" become a paying market for follow-on and complementaryproducts, as often happens.